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Finding the Fourth Proportional to 139,233.30, 192,142.12 and 75,571.12

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Solution

The fourth proportional to 139,233.30, 192,142.12 and 75,571.12 is: 104,288.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,233.30 : 192,142.12 = 75,571.12 : x
  2. Step 2: Convert to fraction form
    139,233.30/192,142.12 = 75,571.12/x
  3. Step 3: Cross multiply
    139,233.30x = 192,142.12 × 75,571.12
  4. Step 4: Simplify right side
    139,233.30x = 14,520,395,207.57
  5. Step 5: Solve for x
    x = 14,520,395,207.57/139,233.30
  6. Step 6: Final answer
    x = 104,288.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.